Abandoned mines in King County, Washington

1. Mine openings

   shafts, adits, air shafts, portals and vertical openings: the ways into underground workings
   102 14.3%
2. Prospect pits and trenches

   shallow exploration diggings that never became a mine
   19 2.7%
3. Mines and surface workings

   labelled mines, open pits, strip mines, placer and hydraulic workings
   68 9.6%
4. Quarries, gravel and borrow pits

   construction-material and industrial-mineral extraction
   490 68.8%
5. Dumps, tailings, spoil and gob

   what mining left above ground
   5 0.7%
6. Mills, tipples and facilities

   processing plants and hazardous structures
   2 0.3%
7. Other reclamation problems

   highwalls, subsidence, polluted or clogged water, fires, slides and gases in OSMRE's inventory
   26 3.7%

A name is the label printed beside the symbol on the map. "First mapped" is the earliest topographic edition that shows the symbol, which bounds the feature's age from above; it is not the date it was worked. Unnamed features (most prospect pits, adits and shafts carry no label) are in the counts above but not this list.

Problem types carry OSMRE's priority prefix: P1 and P2 are threats to health, safety and property, P3 is environmental. A problem area is a cluster of problems reclaimed as one project; several rows can share one location.

1. 155 5

   Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502134
   Abandoned 1979-07-09
2. 211 2-No 1 Quarry

   Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501955
   Abandoned 1979-07-09
3. 211 2-No 2 Quarry

   Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501961
   Abandoned 1979-07-09
4. 3 Lakes Quarry

   Surface metal/non-metal · GDN Enterprises, Inc · MSHA ID 4503566
   Abandoned 2006-06-04
5. 640 Road Pit

   Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502115
   Abandoned 1979-07-09
6. 700 Road Vista Pit

   Surface metal/non-metal · Olson & Taylor Inc · MSHA ID 4502118
   Abandoned 1980-09-16
7. 700-780 Junction Pit

   Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502119
   Abandoned 1979-07-09
8. A-400 Pit

   Surface metal/non-metal · Associated Sand & Gravel Company Inc · MSHA ID 4502129
   Abandoned 1981-01-12
9. American Pit And Plant

   Surface metal/non-metal · American Concrete Inc · MSHA ID 4501109
   Abandoned 1978-06-08
10. Bear Crushing One

    Surface metal/non-metal · Bear Crushing Inc · MSHA ID 4503075
    Abandoned 2002-04-19
11. Beckler River Pit

    Surface metal/non-metal · Aurora Equipment Inc · MSHA ID 4502811
    Abandoned 1980-08-29
12. Ben Jones

    Surface metal/non-metal · Cadman (Rock) Inc · MSHA ID 4503077
    Abandoned 1994-02-22
13. Black River Pit

    Surface metal/non-metal · Lakeside Industries, Inc · MSHA ID 4501582
    Abandoned 2013-12-01
14. Black River Quarry

    Surface metal/non-metal · Stoneway Rock & Recycling · MSHA ID 4503180
    Abandoned 2002-06-18
15. Blum Clay Mine

    Surface metal/non-metal · Moulden & Sons' Inc · MSHA ID 4500250
    Abandoned 1987-05-01
16. Bpa 31 Pit

    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502060
    Abandoned 1979-07-09
17. Bremmeyer

    Surface metal/non-metal · Bremmeyer Logging · MSHA ID 4503506
    Abandoned 2003-11-04
18. Bremmeyer Pit

    Surface metal/non-metal · Bremmeyer Excavating Inc · MSHA ID 4502832
    Abandoned 1985-05-02
19. Brick Road Pit And Plant

    Surface metal/non-metal · Hos Brothers Bulldozing Inc · MSHA ID 4501357
    Abandoned 1980-09-24
20. Cadman (Redmond)

    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4500585
    Abandoned 2025-06-05
21. Cadman Black Diamond

    Surface metal/non-metal · HM Pacific Northwest, Inc. · MSHA ID 4501227
    Abandoned 2024-10-01
22. Cadman Pit And Screening Plant

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4500520
    Abandoned 1981-01-12
23. Camp Brown Quarry

    Surface metal/non-metal · U S Forest Service · MSHA ID 4501960
    Abandoned 1980-03-11
24. Canton Creek Quarry

    Surface metal/non-metal · Montgomery-Nordhougen Inc · MSHA ID 4502851
    Abandoned 1984-08-10
25. Cascade Pit

    Surface metal/non-metal · Cascade Sand & Gravel · MSHA ID 4502678
    Abandoned 1985-05-02
26. Cedar Mountain Pit

    Surface metal/non-metal · Rivera & Green Inc · MSHA ID 4502212
    Abandoned 1992-10-18
27. Churchill Pit

    Surface metal/non-metal · Churchill Sand & Gravel Co · MSHA ID 4500731
    Abandoned 1985-09-23
28. City Dump Gravel Pit

    Surface metal/non-metal · City Of Enumclaw-Wa · MSHA ID 4501166
    Abandoned 1980-02-14
29. Coal Creek Pit & Plant

    Surface metal/non-metal · C Martin Trucking Inc · MSHA ID 4502732
    Abandoned 1980-08-01
30. Corliss Fikse Pit

    Surface metal/non-metal · Corliss Company · MSHA ID 4501215
    Abandoned 1979-03-07
31. Covington Pit

    Surface metal/non-metal · Iddings Inc · MSHA ID 4501491
    Abandoned 1985-09-09
32. Covington Pit - Division #9

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501200
    Abandoned 1979-04-30
33. Crabtree Pit

    Surface metal/non-metal · Mid-Island Rock Products Inc · MSHA ID 4502804
    Abandoned 1980-09-17
34. Damon Mill

    Facility metal/non-metal · C S S Management · MSHA ID 4502962
    Abandoned 1988-07-01
35. Damon Mine

    Underground metal/non-metal · C S S Management · MSHA ID 4502843
    Abandoned 1982-04-13
36. Diamond Pit - Div 9

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502299
    Abandoned 1979-10-11
37. Dumor Pit

    Surface metal/non-metal · Dumor Sand & Gravel · MSHA ID 4503150
    Abandoned 1989-09-01
38. E-Z Dozing Portable Crusher

    Surface metal/non-metal · E-Z Dozing · MSHA ID 4501992
    Abandoned 1987-07-08
39. Edwards Pit

    Surface metal/non-metal · M A Segale Inc · MSHA ID 4501186
    Abandoned 1990-09-24
40. Elk Pit

    Surface metal/non-metal · Mutual Materials Company · MSHA ID 4500256
    Abandoned 2015-10-01
41. Franklin No 10 Strip

    Surface coal · Palmer Coking Coal Company · MSHA ID 4500272
    Abandoned 1972-05-24
42. GH Rock Products

    Surface metal/non-metal · Crown Lakes LLC · MSHA ID 4503616
    Abandoned 2015-07-27
43. GH Rock Products Talus Slope Mine

    Surface metal/non-metal · Wisdom Earthworks Inc. · MSHA ID 4503609
    Abandoned 2006-10-10
44. Granite Products LLC

    Surface metal/non-metal · Granite Products LLC · MSHA ID 4503567
    Abandoned 2012-10-01
45. Harris Clay Mine

    Surface metal/non-metal · Moulden & Sons' Inc · MSHA ID 4501101
    Abandoned 1987-05-01
46. HAYES SAND & GRAVEL LLC

    Surface metal/non-metal · Hayes Sand & Gravel Llc · MSHA ID 4503369
    Abandoned 2006-10-06
47. Hazen Quarry

    Surface metal/non-metal · Universal/Land Construction Company · MSHA ID 4503217
    Abandoned 1993-08-25
48. HOMESTEAD GRAVEL PIT

    Surface metal/non-metal · Fiorito Brothers Inc · MSHA ID 4502131
    Abandoned 2004-08-23
49. Horizon Sand & Gravel

    Surface metal/non-metal · Horizon Sand & Gravel · MSHA ID 4502757
    Abandoned 1994-01-07
50. Iddings Portable Wash Plant

    Surface metal/non-metal · Iddings Inc · MSHA ID 4502586
    Abandoned 1994-09-08
51. Indian Pit

    Surface metal/non-metal · M A Segale Inc · MSHA ID 4501236
    Abandoned 1979-02-13
52. Issaquah Shed Pit - Div 4

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501308
    Abandoned 1981-01-12
53. John Henry No 1 Mine

    Surface coal · Pacific Coast Coal Company · MSHA ID 4502967
    Abandoned 2018-10-01
54. KANGLEY

    Surface metal/non-metal · Kangley Sand & Gravel · MSHA ID 4503377
    Abandoned 1998-12-23
55. Kangley Plant

    Surface metal/non-metal · City Transfer Inc · MSHA ID 4503380
    Abandoned 2007-06-14
56. Kent Highlands Pit

    Surface metal/non-metal · City Transfer Inc · MSHA ID 4502241
    Abandoned 1981-07-28
57. Kirkland Sand & Gravel Pit

    Surface metal/non-metal · Kirkland Sand & Gravel Inc · MSHA ID 4500648
    Abandoned 1978-09-15
58. Lake Frances Pit

    Surface metal/non-metal · Kangley Rock & Recycling · MSHA ID 4503489
    Abandoned 2024-01-12
59. Lake Francis Pit

    Surface metal/non-metal · Mid Island Rock Products · MSHA ID 4502848
    Abandoned 1982-12-13
60. LAKELAND HILLS PIT

    Surface metal/non-metal · Northwest Aggregates · MSHA ID 4503318
    Abandoned 1998-01-12
61. Little Mountain Pit

    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502065
    Abandoned 1979-08-07
62. Loid Pit

    Surface metal/non-metal · Eastside Sand & Gravel Company · MSHA ID 4503080
    Abandoned 1987-10-30
63. Mainline 100 Pit

    Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4501958
    Abandoned 1979-08-07
64. Maltby Sand & Gravel

    Surface metal/non-metal · Maltby Sand & Gravel · MSHA ID 4500583
    Abandoned 1990-03-01
65. Maple Valley Peat Mine

    Surface metal/non-metal · Maple Valley Humis Company · MSHA ID 4500398
    Abandoned 1982-05-21
66. Maury Island Plant

    Surface metal/non-metal · Western-Pacific Construction Materials Company · MSHA ID 4500630
    Abandoned 1986-04-03
67. Maury Island Sand & Grav dba CalPortland

    Surface metal/non-metal · CalPortland Company · MSHA ID 4502526
    Abandoned 2009-09-10
68. May Valley Pit

    Surface metal/non-metal · May Valley Sand & Gravel · MSHA ID 4502959
    Abandoned 1985-04-30
69. Mckay-Section 12 Surface Coal Mine

    Surface coal · Palmer Coking Coal Company · MSHA ID 4502150
    Abandoned and Sealed 1985-11-15
70. Melita Pit - Div 10

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502014
    Abandoned 1982-08-17
71. Middle Fork Prospect

    Underground metal/non-metal · Houston Oil & Minerals Corp · MSHA ID 4500890
    Abandoned 1978-05-10
72. Miles Sand & Gravel

    Surface metal/non-metal · Miles Sand & Gravel · MSHA ID 4500662
    Abandoned 2014-10-10
73. Miller River Quarry

    Surface metal/non-metal · Morrison-Knudsen Company Inc · MSHA ID 4500039
    Abandoned 1978-06-22
74. Milton Pit

    Surface metal/non-metal · Lloyd Enterprises, Inc. · MSHA ID 4503069
    Abandoned 2023-02-22
75. Mono Mine

    Underground metal/non-metal · Mono Mine Inc · MSHA ID 4500478
    Abandoned 1980-02-22
76. MORGAN KAME TERRACE

    Surface metal/non-metal · Palmer Coking Coal Company LLP · MSHA ID 4503338
    Abandoned 2026-07-09
77. Moulden Pit

    Surface metal/non-metal · Moulden & Associates · MSHA ID 4502588
    Abandoned 1985-05-02
78. Mountain View Pit

    Surface metal/non-metal · Watson Asphalt & Paving Company Inc · MSHA ID 4501356
    Abandoned 1979-07-18
79. Mt Si Quarry

    Surface metal/non-metal · Mt Si Quarry SMM · MSHA ID 4502189
    Abandoned 2025-02-13
80. Muth Quarry

    Surface metal/non-metal · Muth Construction Company · MSHA ID 4501185
    Abandoned 1979-10-02
81. Newcastle Brick Plant Mill

    Facility metal/non-metal · Mutual Materials Company · MSHA ID 4502191
    Abandoned 1979-06-21
82. North Bend Pit Div 5

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501192
    Abandoned 1981-09-21
83. North Fork Pit

    Surface metal/non-metal · H L Riley Hauling Co · MSHA ID 4501720
    Abandoned 1978-12-11
84. Nursery Pit

    Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4500500
    Abandoned 1979-12-11
85. Person Pit

    Surface metal/non-metal · Person Sand & Gravel Inc · MSHA ID 4503167
    Abandoned 1989-10-30
86. PLANT 2704

    Surface metal/non-metal · M A Segale Inc · MSHA ID 4503047
    Abandoned 2001-08-13
87. Plant No 4

    Surface metal/non-metal · Reid Sand & Gravel Inc · MSHA ID 4500681
    Abandoned 1985-09-23
88. Pohl Pit - Div 10

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502467
    Abandoned 1981-01-12
89. Poobrager Pit - Div 9

    Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501309
    Abandoned 1978-09-07
90. Portable #1

    Surface metal/non-metal · D & R Excavating Inc · MSHA ID 4503516
    Abandoned 2003-07-11
91. PORTABLE CRUSHER #2705

    Surface metal/non-metal · M A Segale Inc · MSHA ID 4503046
    Abandoned 1999-05-11
92. PORTABLE CRUSHER JESAB

    Surface metal/non-metal · Jensen Sand & Gravel Inc · MSHA ID 4503432
    Abandoned 2004-10-19
93. Portable Metso 96

    Surface metal/non-metal · Stafford Excavating LLC · MSHA ID 4503832
    Abandoned 2024-08-13
94. PORTABLE PLANT

    Surface metal/non-metal · MATERIAL PROCESSING INC · MSHA ID 4503580
    Abandoned 2007-09-17
95. Portable Screen Chieftain

    Surface metal/non-metal · Jensen Sand & Gravel Inc · MSHA ID 4503431
    Abandoned 2004-10-19
96. Powerscreen

    Surface metal/non-metal · Santana Trucking & Excavating Inc · MSHA ID 4503026
    Abandoned 1993-04-12
97. Ps-A-224 Pit

    Surface metal/non-metal · Washington State Department Of Highways · MSHA ID 4502388
    Abandoned 1978-10-12
98. Puget Sound Surfacers Inc G6

    Surface metal/non-metal · Puget Sound Surfacers Inc · MSHA ID 4503398
    Abandoned 2023-11-09
99. Quadrant Pit

    Surface metal/non-metal · Hos Brothers Construction Inc · MSHA ID 4503151
    Abandoned 1990-11-13
100. Quarry Pit

     Surface metal/non-metal · De Gross Construction Inc · MSHA ID 4502422
     Abandoned 1980-05-01
101. Quartzite Quarry

     Surface metal/non-metal · Manufacturers Mineral Company · MSHA ID 4501123
     Abandoned 1978-01-17
102. R & R Gravel

     Surface metal/non-metal · R & R Investments Inc · MSHA ID 4502743
     Abandoned 1984-02-07
103. Raging River Quarry

     Surface metal/non-metal · May Valley Sand & Gravel LLC · MSHA ID 4502195
     Abandoned 2020-03-09
104. Railroad Pit

     Surface metal/non-metal · Burlington Northern Inc · MSHA ID 4502311
     Abandoned 1978-02-24
105. Ravensdale Pit

     Surface metal/non-metal · Industrial Mineral Products Inc · MSHA ID 4502675
     Abandoned 1985-01-21
106. RED-E TOPSOIL

     Surface metal/non-metal · Red-E Topsoil · MSHA ID 4503409
     Abandoned 2001-08-13
107. Redmond Pit

     Surface metal/non-metal · M & M Crushing Company Inc · MSHA ID 4500679
     Abandoned 1982-12-13
108. Reid Pit

     Surface metal/non-metal · Peter Kiewit Sons' Company · MSHA ID 4502699
     Abandoned 1980-08-29
109. Reith Road Pit

     Surface metal/non-metal · City Transfer Inc · MSHA ID 4501226
     Abandoned 1982-10-06
110. Renton Concrete Recyclers

     Surface metal/non-metal · Renton Concrete Recyclers · MSHA ID 4500006
     Abandoned 1990-03-01
111. Renton Pit - Division #4

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4502298
     Abandoned 1979-04-16
112. RESERVE SILICA CORPORATION

     Surface metal/non-metal · Reserve Silica Corp · MSHA ID 4500823
     Abandoned 2010-10-11
113. Road 10 Pit

     Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502061
     Abandoned 1982-05-21
114. Road 150 Pit

     Surface metal/non-metal · Morton Crushing Company · MSHA ID 4502830
     Abandoned 1980-09-09
115. Road 50 Main Pit

     Surface metal/non-metal · City Of Seattle Water Shed · MSHA ID 4502058
     Abandoned 1982-05-21
116. Rogers No 3 (Ug)

     Underground coal · Palmer Coking Coal Company · MSHA ID 4500325
     Abandoned 1975-09-18
117. S & S Enterprises

     Surface metal/non-metal · S & S Enterprises · MSHA ID 4502758
     Abandoned 1991-06-06
118. Samac Portable Plant

     Surface metal/non-metal · Samac Trucking · MSHA ID 4503088
     Abandoned 1992-11-25
119. SCREEN PLANT #1

     Surface metal/non-metal · Summit Inc · MSHA ID 4503400
     Abandoned 2001-08-13
120. Seattle Plant

     Facility metal/non-metal · Lafarge North America Inc · MSHA ID 4500805
     Abandoned 2020-01-17
121. Section 31 Mine

     Surface metal/non-metal · Mutual Materials Company · MSHA ID 4501052
     Abandoned 2010-07-19
122. Section 31 Pit

     Surface metal/non-metal · Stowe Construction Inc · MSHA ID 4503065
     Abandoned 1994-08-11
123. SNOQUALMIE DISTRICT MINE

     Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4503037
     Abandoned 1999-10-23
124. Southworth Portable Crusher

     Surface metal/non-metal · Southworth & Sons Inc · MSHA ID 4501586
     Abandoned 1991-08-20
125. Standard Pit

     Surface metal/non-metal · Lloyd Enterprises Inc · MSHA ID 4501145
     Abandoned 1990-06-12
126. Stergion Pit

     Surface metal/non-metal · Tim Corliss & Son Inc · MSHA ID 4500773
     Abandoned 1976-10-07
127. Stillwater Pit

     Surface metal/non-metal · Cadman Gravel Company · MSHA ID 4502795
     Abandoned 1986-03-11
128. Summit Pit-Division 7

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501194
     Abandoned 1981-01-12
129. Sunset Materials

     Surface metal/non-metal · Sunset Materials · MSHA ID 4503197
     Abandoned 1994-04-26
130. Sunset Quarry

     Surface metal/non-metal · Stoneway Rock & Recycling Co · MSHA ID 4500087
     Abandoned 1994-12-16
131. Swan Quarry

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4500036
     Abandoned 1981-09-21
132. Sweet Point Quarry

     Surface metal/non-metal · Washington State Department Of Highways · MSHA ID 4502523
     Abandoned 1979-03-09
133. Tanner Falls

     Surface metal/non-metal · Fury Site Works Inc · MSHA ID 4503732
     Abandoned 2015-09-04
134. Tjomsland Pit - Division 10

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501230
     Abandoned 1979-05-01
135. Tonga Ridge Pit

     Surface metal/non-metal · B B & K Crushing Inc · MSHA ID 4502861
     Abandoned 1985-04-29
136. Tri-State Portable Plant

     Surface metal/non-metal · Tri-State Construction Inc · MSHA ID 4503097
     Abandoned 1986-10-28
137. Tukwila Crushing And Screening Plan

     Surface metal/non-metal · M A Segale Inc · MSHA ID 4501144
     Abandoned 1979-02-13
138. Usfs/Snoqualmie Natl Forest

     Surface metal/non-metal · U S Forest Service · MSHA ID 4502130
     Abandoned 1980-03-11
139. Valley T Pit

     Surface metal/non-metal · Valley Topsoil Inc · MSHA ID 4502824
     Abandoned 1980-08-08
140. Valley Topsoil Pit

     Surface metal/non-metal · Valley Topsoil Inc · MSHA ID 4503149
     Abandoned 1990-08-01
141. Veazey Quarry

     Surface metal/non-metal · Meridian Aggregates Company · MSHA ID 4500061
     Abandoned 1989-05-15
142. Veazie Quarry #2 - Division 9

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501201
     Abandoned 1979-04-18
143. WHITE RIVER DISTRICT MINE

     Surface metal/non-metal · Weyerhaeuser Company · MSHA ID 4502423
     Abandoned 2000-08-26
144. Wilderness Rock Quarry

     Surface metal/non-metal · Wilderness Rock Quarry · MSHA ID 4502414
     Abandoned 1980-02-26
145. Woodinville Pit

     Surface metal/non-metal · King County Department Of Public Works · MSHA ID 4501187
     Abandoned 1979-02-12

Status and date are as reported to MSHA by the operator. Each mine's own page carries its accident, citation and inspection record.

• Okanogan County 1,225
• Stevens County 1,033
• Cowlitz County 571
• Spokane County 448
• Lewis County 427
• Pierce County 422
• Ferry County 384
• Kittitas County 369
• Lincoln County 350
• Grant County 295
• Chelan County 292
• Grays Harbor County 285

1. USGS, Consolidated Prospect- and Mine-Related Features from 7.5- and 15-Minute Topographic Quadrangle Maps of the United States (USMIN)
   597,612 point and area features digitized from about 106,350 historical topographic maps published 1886–2006; public domain (CC0). A feature is a map symbol, not a field-verified site, and the map does not say whether it was still worked.
2. USGS Fact Sheet 2025–3003, The Abandoned Mine Inventory of the United States
   States that as of 2025 there is no comprehensive national inventory of abandoned mine features, and that the detailed national database now being built will not be published.
3. OSMRE, Abandoned Mine Land Inventory System (e-AMLIS), public Problems layer
   One row per abandoned mine land problem in a problem area, with its type, funding program and reclamation status; mostly coal mined before the 1977 Surface Mining Control and Reclamation Act. Coordinates are the problem area's.
4. MSHA, Mines dataset (Mine Data Retrieval System)
   Every mine registered with MSHA since the 1970s; a mine reads Abandoned or Abandoned and Sealed when its operator reported that status. Refreshed weekly.
5. US Census Bureau, 2023 cartographic county boundaries (1:500,000)
   Each feature's county is assigned by its coordinates against these boundaries, not copied from the source file.
6. GAO-20-238, Abandoned Hardrock Mines (March 2020)
   Federal agencies had identified at least 140,000 abandoned hardrock mine features on federal land and estimated more than 390,000 more not yet captured in their databases.
7. Abandoned Hardrock Mine Reclamation (AHMR) Program, US Department of the Interior
   The program the USGS inventory is compiled for. Its appropriations and the 674,000 field-confirmed feature count on this page were provided by the program manager, Office of Environmental Policy and Compliance, and are cited with permission (2026-09-08).
8. IMCC-NAAMLP Hardrock AML Report
   Page 48 carries the two figures this page leans on: USGS estimates 633,181 of the 725,690 mine features it recorded from historic topographic maps, 87 percent, are hardrock; and state and federal agencies have submitted more than 724,000 AML features to the national database being built, already more than the historic maps hold. Year-by-year AHMR funding is on page 35.